Mercurial > hg
view contrib/discovery-helper.sh @ 40999:dcac24ec935b
commandserver: preload repository in master server and reuse its file cache
This greatly speeds up repository operation with lots of obsolete markers:
$ ls -lh .hg/store/obsstore
-rw-r--r-- 1 yuya yuya 21M Dec 2 17:55 .hg/store/obsstore
$ time hg log -G -l10 --pager no
(hg) 1.79s user 0.13s system 99% cpu 1.919 total
(chg uncached) 0.00s user 0.01s system 0% cpu 1.328 total
(chg cached) 0.00s user 0.00s system 3% cpu 0.180 total
As you can see, the implementation of the preloader function is highly
experimental. It works, but I'm yet to be sure how things can be organized.
So I don't want to formalize the API at this point.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Wed, 31 Oct 2018 22:43:08 +0900 |
parents | 01c335afc997 |
children |
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#!/bin/bash # # produces two repositories with different common and missing subsets # # $ discovery-helper.sh REPO NBHEADS DEPT # # The Goal is to produce two repositories with some common part and some # exclusive part on each side. Provide a source repository REPO, it will # produce two repositories REPO-left and REPO-right. # # Each repository will be missing some revisions exclusive to NBHEADS of the # repo topological heads. These heads and revisions exclusive to them (up to # DEPTH depth) are stripped. # # The "left" repository will use the NBHEADS first heads (sorted by # description). The "right" use the last NBHEADS one. # # To find out how many topological heads a repo has, use: # # $ hg heads -t -T '{rev}\n' | wc -l # # Example: # # The `pypy-2018-09-01` repository has 192 heads. To produce two repositories # with 92 common heads and ~50 exclusive heads on each side. # # $ ./discovery-helper.sh pypy-2018-08-01 50 10 set -euo pipefail if [ $# -lt 3 ]; then echo "usage: `basename $0` REPO NBHEADS DEPTH" exit 64 fi repo="$1" shift nbheads="$1" shift depth="$1" shift leftrepo="${repo}-left" rightrepo="${repo}-right" left="first(sort(heads(all()), 'desc'), $nbheads)" right="last(sort(heads(all()), 'desc'), $nbheads)" leftsubset="ancestors($left, $depth) and only($left, heads(all() - $left))" rightsubset="ancestors($right, $depth) and only($right, heads(all() - $right))" echo '### building left repository:' $left-repo echo '# cloning' hg clone --noupdate "${repo}" "${leftrepo}" echo '# stripping' '"'${leftsubset}'"' hg -R "${leftrepo}" --config extensions.strip= strip --rev "$leftsubset" --no-backup echo '### building right repository:' $right-repo echo '# cloning' hg clone --noupdate "${repo}" "${rightrepo}" echo '# stripping:' '"'${rightsubset}'"' hg -R "${rightrepo}" --config extensions.strip= strip --rev "$rightsubset" --no-backup